before vowels neur-, word-forming element meaning "pertaining to a nerve or nerves or the nervous system," from Greek neuro-, comb. form of neuron "nerve," originally "sinew, tendon, cord, bowstring," also "strength, vigor," from PIE *(s)neu- "tendon, sinew" (see nerve).
neuro- or neur-
pref.
Nerve: neuroblast.
Neural: neuropathology.